Replacing all local power with a nuclear reactor isn’t necessary for the department’s goals, but one or more small reactors, located on base, would ensure that if the local power grid goes down, critical functions will still be able to operate. According to an October 2018 technical report by the Nuclear Energy Institute, 90 percent of military installations have “an average annual energy use that can be met by an installed capacity of nuclear power” of 40 MWe (megawatt electric) or less.